diff options
Diffstat (limited to 'Lib/test/test_set.py')
| -rw-r--r-- | Lib/test/test_set.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py index 46e4000..cfb17b0 100644 --- a/Lib/test/test_set.py +++ b/Lib/test/test_set.py @@ -391,6 +391,15 @@ class TestFrozenSet(TestJointOps): s.__init__(self.otherword) self.assertEqual(s, set(self.word)) + def test_singleton_empty_frozenset(self): + f = frozenset() + efs = [frozenset(), frozenset([]), frozenset(()), frozenset(''), + frozenset(), frozenset([]), frozenset(()), frozenset(''), + frozenset(xrange(0)), frozenset(frozenset()), + frozenset(f), f] + # All of the empty frozensets should have just one id() + self.assertEqual(len(set(map(id, efs))), 1) + def test_constructor_identity(self): s = self.thetype(range(3)) t = self.thetype(s) @@ -456,6 +465,17 @@ class TestFrozenSetSubclass(TestFrozenSet): t = self.thetype(s) self.assertEqual(s, t) + def test_singleton_empty_frozenset(self): + Frozenset = self.thetype + f = frozenset() + F = Frozenset() + efs = [Frozenset(), Frozenset([]), Frozenset(()), Frozenset(''), + Frozenset(), Frozenset([]), Frozenset(()), Frozenset(''), + Frozenset(xrange(0)), Frozenset(Frozenset()), + Frozenset(frozenset()), f, F, Frozenset(f), Frozenset(F)] + # All empty frozenset subclass instances should have different ids + self.assertEqual(len(set(map(id, efs))), len(efs)) + # Tests taken from test_sets.py ============================================= empty_set = set() |